/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/MeshNormals.h
Retrieve the area and/or angle weights for each vertex of a triangle
static FVector3d GetVertexWeightsOnTriangle ( const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) * Mesh, int TriID, double TriArea, bool bWeightByArea, bool bWeightByAngle )